# US 10,767,068 B2 · Photocurable inkjet printing ink composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,068 B2 - Document ID: US10767068B2 - Status: Granted - Kind: B2 - Application number: 16/079,043 - Filed: 2017-01-31 - Published: 2019-02-28 - Granted: 2020-09-08 - Earliest claimed: 2016-02-23 - Assignees: Sakata Inx Corporation - Applicants: Sakata Inx Corporation - Inventors: Okinori Nakashima; Takuya Myose; Takuya Okamoto; Kazuhiro Fuke - Web page: https://patentgrep.com/patent/US10767068B2 ## CPC - C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes - C09D 11/037: characterised by the pigment - C09D 11/101: Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing - C09D 11/106: containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds - C09D 11/107: from unsaturated acids or derivatives thereof - C09D 11/30: Inkjet printing inks - C09D 11/32: characterised by colouring agents - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) ## Abstract A photocurable inkjet printing ink composition contains a photopolymerizable compound and a photopolymerization initiator, wherein in 100 percent by mass of the photocurable inkjet printing ink composition, included are: an acrylamide-based monomer by 5.0 to 50 percent by mass; a monofunctional monomer other than acrylamide-based monomer by 15 to 70 percent by mass; a polymerizable compound having two or more functionalities by 5.0 to 30.0 percent by mass; vinyl caprolactam by 0.1 to 15 percent by mass and/or an acrylated amine compound having two photopolymerizable functional groups and two amino groups in the molecule by 0 to 10 percent by mass; and the percentage of monofunctional monomers in the photopolymerizable compound is 60 to 99.5 percent by mass. ## Claims ### Claim 1 A photocurable inkjet printing ink composition containing a photopolymerizable compound and a photopolymerization initiator, wherein in 100 percent by mass of the photocurable inkjet printing ink composition, included are: a. an acrylamide-based monomer by 22.0 to 50 percent by mass, which is expressed by General Formula (I) below: CH2═CR4-CON(R5)R6 wherein R4 represents a hydrogen atom or a methyl group; R5 and R6 may be the same or different, and although they are each a hydrogen atom or a substituted or an unsubstituted alkyl group with the carbon number from 1 to 8, they are not a hydrogen atom at the same time; and alternatively, R5 and R6 may be bonded to form a ring together with an adjacent nitrogen atom; b. a monofunctional monomer other than acrylamide-based monomer by 15 to 70 percent by mass; c. a polymerizable compound having two or more functionalities by 5.0 to 20.0 percent by mass; d. an acrylated amine compound having two photopolymerizable functional groups and two amino groups in the molecule by more than 0 percent by mass but no more than 10 percent by mass; and e. the percentage of monofunctional monomers in the photopolymerizable compound is 60 to 99.5 percent by mass. ### Claim 2 (depends on 1) The photocurable inkjet printing ink composition according to claim 1, wherein the acrylamide-based monomer is an acryloyl morpholine. ### Claim 3 (depends on 1) The photocurable inkjet printing ink composition according to claim 1, wherein the photopolymerization initiator contains an acylphosphine oxide photopolymerization initiator and the acylphosphine oxide photopolymerization initiator accounts for 2 to 15 percent by mass relative to 100 percent by mass of the photopolymerizable compound. ### Claim 4 (depends on 1) The photocurable inkjet printing ink composition according to claim 1, wherein the photopolymerization initiator contains a thioxanthone photopolymerization initiator and the thioxanthone photopolymerization initiator accounts for 5 percent by mass or less relative to 100 percent by mass of the photopolymerizable compound. ### Claim 5 (depends on 1) The photocurable inkjet printing ink composition according to claim 1, which contains a coloring agent. ### Claim 6 (depends on 1) The photocurable inkjet printing ink composition according to claim 1, of which viscosity at 25° C. is 5.0 to 30 m·Pas. ### Claim 7 (depends on 2) The photocurable inkjet printing ink composition according to claim 2, wherein the photopolymerization initiator contains an acylphosphine oxide photopolymerization initiator and the acylphosphine oxide photopolymerization initiator accounts for 2 to 15 percent by mass relative to 100 percent by mass of the photopolymerizable compound. ### Claim 8 (depends on 2) The photocurable inkjet printing ink composition according to claim 2, wherein the photopolymerization initiator contains a thioxanthone photopolymerization initiator and the thioxanthone photopolymerization initiator accounts for 5 percent by mass or less relative to 100 percent by mass of the photopolymerizable compound. ### Claim 9 (depends on 2) The photocurable inkjet printing ink composition according to claim 2, which contains a coloring agent. ### Claim 10 (depends on 2) The photocurable inkjet printing ink composition according to claim 2, of which viscosity at 25° C. is 5.0 to 30 mPa·s. ### Claim 11 (depends on 3) The photocurable inkjet printing ink composition according to claim 3, wherein the photopolymerization initiator contains a thioxanthone photopolymerization initiator and the thioxanthone photopolymerization initiator accounts for 5 percent by mass or less relative to 100 percent by mass of the photopolymerizable compound. ### Claim 12 (depends on 3) The photocurable inkjet printing ink composition according to claim 3, which contains a coloring agent. ### Claim 13 (depends on 3) The photocurable inkjet printing ink composition according to claim 3, of which viscosity at 25° C. is 5.0 to 30 mPa·s. ### Claim 14 (depends on 4) The photocurable inkjet printing ink composition according to claim 4, which contains a coloring agent.